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I was wondering the same thing. I am having serious issues with my Hornady dies. I can eject factory ammo , but not handloads from my Hornady dies. Im thinking that they are out of spec just a tad. ill be keeping up with this post to see if anyone else chimes in.

So the RCBS .264 LBC-AR SB T/C Die set will work for the Grendel cartridge?

WB:

Absolutely correct. There is no, zero, none -- nada -- difference in chambers between the LBC and the Grendel. The dies are identical. The throats are different. The Grendel uses a compound throat and the LBC a more conventional throat with more leade. So, if you are fine tuning overall length, you may find a difference. However, in terms of the brass being sized down to the correct dimensions, there is no difference. The chambers are the same.

I would say that 95% of the problems with chambering and extracting sized brass is the handloader failed to bump the shoulder back enough. The other 5 % is because the handloader seated the bullet too far out of the case for proper chambering.

The topic of bumping brass and cartridge OAL comes up about twice a month.

There is no, zero, none -- nada -- difference in chambers between the LBC and the Grendel. The dies are identical. The throats are different. The Grendel uses a compound throat and the LBC a more conventional throat with more leade.

Doesn't change the feasibility of dies, but chamber neck diameters are also different. Grendel is .300" and 264 LBC is .295".

So the RCBS .264 LBC-AR SB T/C Die set will work for the Grendel cartridge?

I personally don't think this RCBS die set will work for you.

I purchased a set of these dies from Midway. They were cut to small at the base/web and would size the base to the point of destroying the case.

Here is a picture of what I experienced.

I contacted RCBS and sent them the sizing die along with 4-5 fired cases.

They were going to modify the SB die to fit my chamber, but decided to replace it with a Standard RCBS FL die as it was a perfect fit to my Grendel Chamber.

I don't know if I got a defective die or RCBS was manufacturing all of them to small, but they admitted that the die was undersized. I also don't know if they went back to the drawing board and fixed their F-up or of they are still sending out undersized dies?

I purchased a set of these dies from Midway. They were cut to small at the base/web and would size the base to the point of destroying the case.

Here is a picture of what I experienced.

I contacted RCBS and sent them the sizing die along with 4-5 fired cases.

They were going to modify the SB die to fit my chamber, but decided to replace it with a Standard RCBS FL die as it was a perfect fit to my Grendel Chamber.

I don't know if I got a defective die or RCBS was manufacturing all of them to small, but they admitted that the die was undersized. I also don't know if they went back to the drawing board and fixed their F-up or of they are still sending out undersized dies?

I have the RCBS catalog open in front of me and it says that the AR series dies use a small base sizer (SB) die, so I wonder if their version of the small base dimension is too small for Grendel brass. FWIW, I use Redding Grendel dies for my 264LBC-AR with no problems.

I have the RCBS catalog open in front of me and it says that the AR series dies use a small base sizer (SB) die, so I wonder if their version of the small base dimension is too small for Grendel brass. FWIW, I use Redding Grendel dies for my 264LBC-AR with no problems.

Zach:

We have been loading Grendel ammo on non SB dies since the cartridge came out. I believe there was one incident on the old forum where I recommended a SB sizing die to a guy. No one made them at the time but I thought his problems could be solved with a SB die.

I don't have much confidence in RCBS so it would not surprise me their SB Grendel die did what it did to your brass. They made the die wrong, probably knew it, sold it anyway, and figure it is cheaper to let the consumer do their QC than for them to do it. I haven't bought RCBS gear for years because of this type of thing.

Send the die back. RCBS will send you a new one. Hopefully, it will work. If not, send it back and they will respond with 'your chamber, loads, alignment of sun and moon', etc., were wrong and not them.

Getting ready to reload my PPU once fired brass, I set up my .264 LBC SB RCBS sizing die and pressed out an empty cartridge. I noticed the case looked strange, kinda like a belted 6.5 Grendel. I am bringing this thread up, as I seemed to have the same problem, with the same set of dies, that I got from Midway within the past few months.

I ran four of the cases and got the same result on all. Here is a picture of the case.

Has anyone else had the same issue recently? I plan on sending these back to Midway.